Very convenient to store in the car. Doesn't last forever if you use it as extensively as I do, they last a year or two then need to be replaced but for $15 or $20 it's worth it. Great if you're stuck or have a slow leak. It also comes with adapters for toys and basketballs etc. Ideal for storage. We now have one in each of our cars. It can save a life. If you have a large truck or SUV (like my mom's Explorer) it may take a little longer for a tire to blow out, but waiting 15 minutes longer is still better than getting stuck there! Also be careful - the metal hose on top can get hot if it's been running for a while, so always hold it by the black plastic parts! Otherwise a fantastic product. Highly recommended.